You also have the famous stories about Ben Siegel who would punch people if they called him 'Bugsy' to his face..

From what Dom Cicale said, Vinny Basciano also didn't really like the name 'Gorgeous' and no one uttered it in his presence..

Recently I heard of a guy in the Philly mob who's nickname is 'Snitch', I don't know how he feels about it but I can't imagine he is too fond about it LOL